Side Cocking Upper With Pinned Thread Protector For Mpa & Mac-10 .45 Acp

This side cocking upper works great on all semi auto Mac-10 .45 acp guns. It comes complete with a pinned, permanent thread protector, picatinny rail mount and is ready to accept your bolt assembly and run on your lower. Works with all MPA .45 acp guns. Great if you live in a state that does not allow exposed threaded barrels.